Multiple choice

Lithium and sodium are placed in the same group of Mendeleev's periodic table. Which of the following statements is true with regard to lithium and sodium?

(i) They have the same electronic configuration. (ii) The formula of their hydrides is the same. (iii) The formula of their oxides is the same.

  1. (i) and (ii)

  2. (ii)

  3. (iii)

  4. (ii) and (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lithium and sodium are placed in the same group of Mendeleev's periodic table because they have the same formulas of hydrides (like LiH and NaH) and oxides (like Li2O and Na2O).

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